import java.io.*;
import java.net.*;
import java.util.*;

public class Cache
{
	Hashtable htable;

	String cachePath = null, tmp=null;
	BufferedReader f=null;
	StringTokenizer z;
	String tablefname="tableFile.txt";

	public Cache()
	{
		htable=new Hashtable();
		try
		{
			// read tableFile.txt and add to hashtable

			File ff=new File(tablefname);
			if(ff.exists())
			{
				f=new BufferedReader(new FileReader(tablefname));
				String line=f.readLine();
				String rawurl="", name="";
				while(line!=null)
				{
					z=new StringTokenizer(line);
					rawurl=z.nextToken();
					name=z.nextToken();
					AddToTable(rawurl, name);
					line=f.readLine();
				}
			}// if(ff.exists())

			// Create directory for caching

			File cacheDir = new File("Cache");
			cacheDir.mkdirs();
			cachePath = cacheDir.getAbsolutePath();
			System.out.println("cachePath: " + cachePath);

			f.close();
		}//try
		catch(Exception e)
		{ System.out.println(e);}

	}
	public String getcachePath()
	{
		return cachePath + File.separatorChar; // --> Cache/
	}


	public boolean IsCached(String rawUrl)
	{

		// Search in hash table
		if (htable.get(rawUrl) != null)
		{
			System.out.println("**"+ htable.get(rawUrl)+" is cached.");
			return true;
		}
		return false;
	}
	public String getFilename(String rawUrl)
	{
		if (htable.get(rawUrl) != null)
			return htable.get(rawUrl).toString();
		else
			return "";
	}

	public synchronized void AddToTable(String rawUrl, String fname)
	{
		htable.put(rawUrl, fname);
	}
}// Cache